Cooking utensil.



PATENTED MAR. 3, 1908. NODE.

O. BLEAN & F. B. GA

COOKING UTENSIL. 'APPLIOATION FILED APR. 25,1907.

" UNITED err-tries PATENT orrron.

' ROBERT C. BLEAN AND FREDERICK l3. OANODE, OF CHICAGO, ILLINOIS; SAIDBLEAN ASSIGNOR TO SAID CANODE.

COOKING UTENSIL.

Specification of Letters Patent.

Patented March 3, 1908.

Application filed April 2 5, 1907. Serial No. 370,284.

' large an extent as possible, radiation of heat from a cooked or partiall cooked substance confined within the utensil The object of the invention is to provide a cooking utensil of this type which is of an improved construction with respect to sanitary considerations and convenience in handling,

which is highly eflicient in retaining the heat of a partially cooked substance, and which is of leasinga pearance.

n accorr ance with the invention, the utensil consists of a suitably shaped receptacle having a removable cover which fits tightly thereon. The receptacle has a double wall and in the space between these walls is a material which is highly efficient as a non-conductor of heat. For this urpose we employ asbestos board, a sheet being preferably laid against each of the walls of the receptacle. The entire s ace between the two walls is not, however, led with asbestos, as we' have found that superior results are obtained by providing for dead-air spaces or cells between the double walls of the recepta'cle, since air conducts heat by radiation very poorly. The cover of the utensil similarly insulated against the radiation of heat therethrough, though for this purpose we may employ heavy felt. For convenience in storing 'the receptacles after the partially cooked substances have been placed in them, we provide a supporting stand and so construct the rece tacles that they can be laid one upon anot er and telescope somewhat so as to be self-sustaining.

The referred embodiment of our invention is i lustrated in the accompanying drawin s, in which igure 1 is a sectional elevation of two of the utensils and a portion of the supporting stand therefor, and Figs. 2 and 3 are sectional detail views, the section line of Fig. 3 being the line 3--3 of Fig. 1.

Referring tothese drawings, the individual.

utensil consists of a receptacle 1 and a cover 2. The receptacle has an inner wall 3 and an outer wall 4', each consisting of a cylindrical side and a circular bottom joined at theiredges in any suitable manner, as by a lap and-fold joint 5, as shown. At the upper edge of the wall 3, an outwardly extending flange 6 is provided, either integralwithv or secured to wall 3, its edge overlying and being secured to the upper edge of the outer wall 4 so as to provide an air-tight space between the two walls. In this space are layers of heat-insulating material and. deadair'cells. Preferably asbestos board is employed for this purpose and provision for the air cells is made by corrugating some or all of the layers of asbesJos. Thus, 7 indicates a plurality of circularpieces of asbestos board lying upon the bottom of the outer wait 4 and corrugated so as to provide air spaces and over this is a similar layer 8 of heavy asbestos board which is not corrugated. A strip 9 of asbestos similar to strip 8 is laid against the board. The upper edge of the strip 11. is

preferably turned outwardly so as to underlie the flange 6, as shown at 13.

The cover 2 has a downwardly extending flange 14 adapted to fit over the outer wall of the receptacle and is provided with heatinsulating material. metallic partition 15 between which and the outer wall are a plurality of layers of asbestos board 16, some or all of which are corrugated.- Secured t0 the under side of the partition 14 is a circular piece of heavy felt 17. This may be held in place by cement or a disk 18 of sheet-metal may be secured to the outer wall of the cover by bolts 19 and serve to hold the felt 16 in place.

When a number of the utensils are to be used, they are preferably so constructed that they may be supported one on top of another, as shown in Fig. 1. Thus, the receptacle 20 is like receptacle 1 except that the bottom thereof is constructed much like the cover 27 A downwardly extending flange 21 is secured to the outer wall'of the receptacle adapted to extend down over the outer Wall 4 of the receptacle 1. Nithin this flange, a

The cover may have a circular piece of heavy felt 22 is cemented to the bottom of the receptacle 20. Each receptacle and cover has handles 23 hinged to opposite sides thereof. A suitable stand 24 is preferably provided forsupporting the receptacles.

In using the utensils, a food substance,

when partially cooked, is placed in the repassing through the wall of the receptacle.

Nhen a second substance is to be similarly treated, the cover 2 is removed and the receptacle is placed on top of the receptacle 1, the cover 2 being brought down over .the top of the receptacle 20 after the substance has been placed therein. Further additions are similarly made as required.

' lit will be seen that the receptacles can be readily kept clean; it"desired, the entire re-. ceptacle can be immersed in Water as the latter cannotflow in about the asbestos. The construction here described is highly eflicient in preventing the radiation of heat and possesses thefurther advantages of being convenient to handle and inexpensive to construct. The saving of fuel consumed in the cooking operation in using the utensil is apparent, as after the substance to be cooked has been raised to or somewhat above the cooking;temperature, nc'further fuel is consumed, the substance being merely placed in one of the receptacles and radiation of heat therefrom being prevented.

Having now described our invent on,

"-what we claim as new therein and desire'to secure by Letters Patent is as fol1ows:-

l. A cocking utensil comprising a receptacle having an inner and an outer wall joined at. their upper edges to provide an air-tight space between them, a 'layer of Y:

asbestos-board lying adjacent to each wall of the receptacle in said air-tight space and a plurality of layers of asbestos-board certain of which are corrugated filling the space between said first-named layers. except for dead-air cells provided by said corru ations, and a cover. adapted to fit over sai receptacle having heat-insulating material secured thereto, substantially as set forth.

2. A cooking utensil comprising a receptacle having an inner and an outer wall one of which has a flange at the upper edge thereof secured to the'edge of the other wall to provide an air-tight space between said walls,

a layer of asbestos-board insaid space adja cent to each of said Walls and to said flange certain of which are corrugated filling the space between said first-named layers except for dead-air cells providedby said corrugations, and a cover adapted to fit over said receptacle and having heat-insulating ina-v terial secured thereto, substantially as set forth.

3. A cooking utensil comprising a receptacle having an inner and an outer wall joined at their upper edges to provide an air-tight space between'them, a layer of asbestos-board lying adjacent to each wall of the receptacle in said air-tight space and a plurality of layers of asbestos-board certain of which are corrugated filling the space between said first-named layers except for dead-air cells provided by said corrugations, a second receptacle similarly constructed and having a downwardly extending portion of the bottom thereof adapted to fit over the Walls of the first receptacle, and a cover for said secondr'ecepta'cle having heatinsulating material secured thereto, substantially as set forth. y v

This specification signed and witnessed this 23rd day of April, 1907.

' ROBERTjC. BLEAN FREDERICK B. CANODE.

Wi'tnesses:

W. A. WATERBURY, U.' G.

and a plurality of layers 'of asbestosboartl., 

